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| phoP | Rv0757, (MTCY369.02), len: 247 aa. Possible phoP,two component system response phosphate regulon transcriptional regulator (see citations below), highly similar to various transcriptional regulators e.g. CAC32360.1|AL583945 putative two component system response regulator from Streptomyces coelicolor (271 aa); T45446 probable two-component response regulator from Mycobacterium leprae (253 aa); and similar to phoP proteins e.g. P13792|PHOP_BACSU alkaline phosphatase synthesis transcription regulatory protein from Bacillus subtilis (240 aa), FASTA scores: opt: 594, E(): 2.3e-33, (41.0% i [...] (247 aa) | ||||
| ricR | Conserved protein; Under low copper conditions, represses the expression of lpqS, Rv2963, mymT, socA, socB, mmcO and its own expression. In the presence of copper, RicR dissociates from DNA, leading to the expression of the target genes. Members of the RicR regulon are important for copper resistance during infections and full virulence in a mouse model of infection. (96 aa) | ||||
| hspR | Rv0353, (MTCY13E10.13), len: 126 aa. Probable hspR,heat shock regulatory protein (see Stewart et al., 2001),merR family, highly similar to others e.g. HspR|P40183 heat shock regulatory protein from Streptomyces coelicolor (151 aa), FASTA scores: E(): 4.9e-22, (55.7% identity in 140 aa overlap), that binds to three inverted repeats (IR1-IR3) in the promoter region of the dnaK operon. Has possible coiled coil region in C-terminal half. Belongs to the MerR family of transcriptional regulators. (126 aa) | ||||
| rskA | Anti-sigma factor RskA (regulator of sigma K); An anti-sigma factor for extracytoplasmic function (ECF) sigma factor SigK. ECF sigma factors are held in an inactive form by an anti-sigma factor until released by regulated intramembrane proteolysis (RIP). RIP occurs when an extracytoplasmic signal triggers a concerted proteolytic cascade to transmit information and elicit cellular responses. The membrane-spanning regulatory substrate protein is first cut extracytoplasmically (site-1 protease, S1P), then within the membrane itself (site-2 protease, S2P, Rip1), while cytoplasmic proteases [...] (232 aa) | ||||
| mce2R | Probable transcriptional regulatory protein Mce2R (GntR-family); Negatively regulates the expression of its operon as well as expression of end (endonuclease 4). (240 aa) | ||||
| ideR | Iron-dependent repressor and activator IdeR; Metal-dependent DNA-binding protein that controls transcription of many genes involved in iron metabolism. Acts as a repressor of siderophore biosynthesis and as a positive modulator of iron storage. Also regulates expression of transporters, proteins involved in siderophore synthesis, iron storage and transcriptional regulators. (230 aa) | ||||
| nrdR | Probable transcriptional regulatory protein NrdR; Negatively regulates transcription of bacterial ribonucleotide reductase nrd genes and operons by binding to NrdR- boxes; Belongs to the NrdR family. (154 aa) | ||||
| lexA | Repressor LexA; Represses a number of genes involved in the response to DNA damage (SOS response), including recA and lexA. Has been shown to bind to the 14 bp palindromic sequence 5'-CGAACNNNNGTTCG-3'. In the presence of single-stranded DNA, RecA interacts with LexA causing an autocatalytic cleavage which disrupts the DNA-binding part of LexA, leading to derepression of the SOS regulon and eventually DNA repair. (236 aa) | ||||
| sirR | Rv2788, (MTV002.53), len: 228 aa. Probable sirR,transcriptional repressor, highly similar to others e.g. Q9RRF3|DR2539 putative iron dependent repressor from Deinococcus radiodurans (232 aa), FASTA scores: opt: 518,E(): 4.5e-26, (41.2% identity in 221 aa overlap); Q9HRU8|SIRR|VNG0536G from Halobacterium sp. strain NRC-1 (233 aa), FASTA scores: opt: 516, E(): 6.1e-26, (40.45% identity in 220 aa overlap); Q9KIJ2|SLOR regulator SLOR from Streptococcus mutans (217 aa), FASTA scores: opt: 418,E(): 1.2e-19, (36.15% identity in 213 aa overlap); etc. Also some similarity to Q50495|IDER_MYCTU|M [...] (228 aa) | ||||
| relG | Toxin RelG; Toxic component of a type II toxin-antitoxin (TA) system. Has RNase activity and preferentially cleaves at the 3'-end of purine ribonucleotides (By similarity). Overexpression in M.tuberculosis or M.smegmatis inhibits colony formation in a bacteriostatic rather than bacteriocidal fashion. Its toxic effect is neutralized by coexpression with cognate antitoxin RelB2 (shown only for M.smegmatis). Overexpression also increases the number of gentamicin-tolerant and levofloxacin-tolerant persister cells. (87 aa) | ||||
| Rv2989 | Rv2989, (MTV012.03), len: 233 aa. Probable transcriptional regulator (ala-rich protein), highly similar to O86533|SC1C2.33c putative transcriptional regulator from Streptomyces coelicolor (238 aa), FASTA scores: opt: 711, E(): 2.3e-38, (53.05% identity in 230 aa overlap); and similar to others e.g. Q9KND6 putative transcriptional regulator from Vibrio cholerae (244 aa),FASTA scores: opt: 232, E(): 1.2e-07, (29.75% identity in 232 aa overlap); Q9R9U0|SRPS efflux pump regulator from Pseudomonas putida (259 aa), FASTA scores: opt: 224, E(): 4.1e-07, (28.35% identity in 247 aa overlap); et [...] (233 aa) | ||||
| whiB7 | Probable transcriptional regulatory protein WhiB-like WhiB7; The apo- but not holo-form probably binds DNA (By similarity). Acts as a transcriptional regulator. Probably redox- responsive. Upon overproduction at least 10 other genes are up- regulated, among them are Rv1258c, Rv1988, Rv2301, Rv2416c, Rv2725c and whiB7 itself. Probably redox-responsive. The apo-form has been shown to act as a protein disulfide reductase. (92 aa) | ||||
| whiB1 | Transcriptional regulatory protein WhiB-like WhiB1. Contains [4FE-4S]2+ cluster; Acts as a transcriptional repressor, inhibiting expression in vitro. Probably redox-responsive. The apo- but not holo-form binds to its own promoter as well as that of groEL2. Oxidized apo-form and nitrosylated holo-form also bind DNA. The apo-form has been shown to act as a protein disulfide reductase , but also not to act as a protein disulfide reductase. (84 aa) | ||||
| rshA | Anti-sigma factor RshA; An redox-regulated anti-sigma factor for extracytoplasmic function (ECF) sigma factor SigH. ECF sigma factors are held in an inactive form by a cognate anti-sigma factor. RshA and some peptides derived from it inhibit the sigma factor activity of SigH. Probably releases SigH during oxidative stress. (101 aa) | ||||
| whiB2 | Probable transcriptional regulatory protein WhiB-like WhiB2; Acts as a transcriptional regulator. Probably redox- responsive. The apo- but not holo-form probably binds DNA (By similarity). (89 aa) | ||||
| rsbW | Anti-sigma factor RsbW (sigma negative effector); A cognate anti-sigma factor for alternative sigma factor SigF. Alternative sigma factors are held in an inactive form by an anti-sigma factor. Binds ATP and GTP, may hydrolyze both. (145 aa) | ||||
| relK | Toxin RelK; Toxic component of a type II toxin-antitoxin (TA) system. Has RNase activity and preferentially cleaves at the 3'-end of purine ribonucleotides (By similarity). Overexpression in M.tuberculosis or M.smegmatis inhibits colony formation in a bacteriostatic rather than bacteriocidal fashion. Its toxic effect is neutralized by coexpression with antitoxin RelJ (shown only for M.smegmatis). Overexpression also increases the number of rifampcin-tolerant persister cells. Belongs to the YoeB family. (85 aa) | ||||
| whiB3 | Transcriptional regulatory protein WhiB-like WhiB3. Contains [4FE-4S] cluster; A redox-sensitive transcriptional regulator. Maintains intracellular redox homeostasis by regulating catabolic metabolism and polyketide biosynthesis. Regulates expression of the redox buffer ergothioneine (ERG) in a carbon-source- dependent manner; loss of ERG or mycothiol (MSH, the other major redox buffer in this bacteria) leads to respiratory alterations and bioenergetic deficiencies that negatively impact virulence. In response to low external pH (like that found in host macrophage phagosomes) alters en [...] (102 aa) | ||||
| cspA | Rv3648c, (MTCY15C10.04), len: 67 aa. Probable cspA,cold shock protein A, identical to O69550|CSPB|CSPA|ML0198 small cold-shock protein from Mycobacterium leprae (67 aa) FASTA scores: opt: 451, E(): 3.7e-27, (97.0% identity in 67 aa overlap). Also highly similar to many e.g. Q9KGW0|CSPA from Mycobacterium smegmatis (67 aa) FASTA scores: opt: 439, E(): 2.9e-26, (92.55% identity in 67 aa overlap); P54584|CSP_ARTGO from Arthrobacter globiformis (67 aa),FASTA scores: opt: 335, E(): 1.5e-18, (73.45% identity in 64 aa overlap); O30875|CSPA_MICLU from Micrococcus luteus (Micrococcus lysodeikti [...] (67 aa) | ||||
| crp | Transcriptional regulatory protein Crp (Crp/Fnr-family); Global transcriptional regulator that complexes with cAMP and binds to specific DNA promoter sites, causing DNA-bending, to regulate transcription. cAMP improves binding to specific DNA sequences, probably by altering protein conformation. The CRP regulon is predicted to contain about 115 genes. Some genes are activated by CRP (rpfA, whiB1) while others are repressed (fadD10). There are 2 CRP-binding sites in the promoter of whiB1, at low concentrations of CRP with or without cAMP transcription of whiB1 is enhanced via site CRP1, [...] (224 aa) | ||||
| whiB4 | Probable transcriptional regulatory protein WhiB-like WhiB4; Redox-responsive transcriptional regulator that regulates a set of genes involved in protection against environmental stresses encountered during infection. The loss of the O(2) and NO-responsive 4Fe-4S cluster and subsequent redox modifications of Cys residue thiols (possibly by disulfide bond formation) may activate its role in gene regulation. The thiol-oxidized apo-form binds in a sequence non- specific manner to GC-rich DNA, probably in the minor groove. Represses transcription of a number of genes including itself. The [...] (118 aa) | ||||
| ethR | Transcriptional regulatory repressor protein (TetR-family) EthR; Involved in the repression of the monooxygenase EthA which is responsible of the formation of the active metabolite of ethionamide (ETH). (216 aa) | ||||
| furA | Ferric uptake regulation protein FurA (fur); Represses transcription of the catalase-peroxidase gene katG and its own transcription by binding to the promoter region in a redox- dependent manner; Belongs to the Fur family. (147 aa) | ||||
| blaI | Transcriptional repressor BlaI; Transcription regulator that binds to an inverted DNA repeat with the consensus sequence 5'-TAC[GT]AC-NNNNN-GT[AC]GTA-3' and regulates genes involved in antibiotic transport, detoxification and cell wall function. Also regulates its own transcription. Binds DNA as a dimer; Belongs to the BlaI transcriptional regulatory family. (138 aa) | ||||
| Rv1773c | Rv1773c, (MTCY28.39), len: 248 aa. Probable transcriptional regulator belonging to IclR family, similar to ICLR_ECOLI|P16528 acetate operon repressor from Escherichia coli (274 aa), FASTA scores: opt: 261, E(): 3.3e-10, (26.9% identity in 249 aa overlap). Also similar to Mycobacterium tuberculosis protein Rv1719|MTCY04C12.04 (40.2% identity in 244 aa overlap); and Rv2989. Start site chosen by homology, but may extend further upstream. Contains possible helix-turn-helix motif at aa 37-58 (+3.24 SD). (248 aa) | ||||
| Rv1766 | Conserved protein; Rv1766, (MTCY28.32), len: 89 aa. Conserved protein,highly similar to P54431|YRKD_BACSU Hypothetical 7.0 kDa protein in bltr-spoIIIC intergenic region from Bacillus subtilis (63 aa), FASTA scores: opt: 151, E(): 1.5e-05,(53.3% identity in 45 aa overlap). Also similar to Q9RD62|SCF56.04C|AL133424 Hypothetical protein from Streptomyces coelicolor (92 aa), FASTA scores: opt: 239,E(): 1.3e-11, (62.5% identity in 64 aa overlap). Also some similarity to other Mycobacterium tuberculosis hypothetical proteins e.g. O07434|Rv0190|MTCI28.29 (96 aa), (35.5% identity in 62 aa over [...] (89 aa) | ||||
| Rv1719 | Rv1719, (MTCY04C12.04), len: 259 aa. Probable transcriptional regulatory protein, similar to YIAJ_ECOLI|P37671 hypothetical transcriptional regulator from Escherichia coli (282 aa), FASTA scores: opt: 353,E(): 3.2e-15, (31.1% identity in 235 aa overlap). Similar to Mycobacterium tuberculosis hypothetical IclR-family transcriptional regulators Rv2989, Rv1773c. Helix-turn-helix motif from aa 34-55 (+6.94 SD). (259 aa) | ||||
| Rv1353c | Probable transcriptional regulatory protein; Negatively regulates the expression of the efflux pump Rv0191 upon chloramphenicol exposure. Acts by binding to the Rv0191 promoter region. (261 aa) | ||||
| mazF3 | Toxin MazF3; Toxic component of a type II toxin-antitoxin (TA) system. Acts as an mRNA and 23S rRNA interferase, cleaving predominantly after the first 2 Us in the sequence 5'-UUCCU-3'; in 23S rRNA only cleaves once in the ribosomal A site in dissociated but not intact ribosomes. Cleavage of 23S rRNA inhibits protein translation; the 23S rRNA region cleaved is involved in tRNA-binding in the A site, 30S and 50S subunit interaction and ribosome recycling factor association. Upon expression in E.coli and M.smegmatis inhibits cell growth and colony formation. It dramatically increases per [...] (103 aa) | ||||
| mprA | Response regulator MprA; Member of the two-component regulatory system MprB/MprA which contributes to maintaining a balance among several systems involved in stress resistance and is required for establishment and maintenance of persistent infection in the host. Functions as a transcriptional regulator that recognizes a 19-bp nucleotide motif comprizing two loosely conserved 8-bp direct DNA-binding motif repeats separated by a 3-bp spacer region. MprB/MprA is involved in regulation of numerous stress-responsive genes, including up-regulation of two sigma factors, sigE and sigB as well [...] (228 aa) | ||||
| csoR | Copper-sensitive operon repressor CsoR; Copper-sensitive repressor that has a key role in copper homeostasis. It is part of the cso operon involved in the cellular response to increasing concentrations of copper inside the bacterium, which can be highly toxic. In the presence of copper, CsoR fully dissociates from the promoter in the cso operon, leading to the transcription of its genes. Binds to a GC-rich pseudopallindromic sequence, 5'-GTAGCCCACCCCCAGTGGGGTGGGA-3', in the cso promoter region. (119 aa) | ||||
| cspB | Rv0871, (MTV043.64), len: 135 aa. Probable cspB,cold shock-like protein B, equivalent to Z99494|MLCB57_7|MLCB57.11 probable cold shock protein from Mycobacterium leprae (136 aa), FASTA scores: opt: 787, E(): 0, (86.0% identity in 136 aa overlap). Also highly similar (but often longer than) to others e.g. CAB93399.1|AL357524 cold shock protein B from Streptomyces coelicolor (127 aa); Q45099|CSPD_BACCE cold shock-like protein CSPD from Bacillus cereus (66 aa); Y101 81|LLCSPB_1 cold shock protein from Lactococcus lactis (66 aa), FASTA scores: opt: 220, E(): 2.5e-07, (48.3% identity in 60 [...] (135 aa) | ||||
| Rv0792c | Probable transcriptional regulatory protein (probably GntR-family); Rv0792c, (MTV042.02c), len: 269 aa. Probable transcriptional regulator, GntR-family, similar to many others of GntR family e.g. BSUB0018_189|Z99121 from Bacillus subtilis (243 aa), FASTA scores: opt: 367, E(): 1.5e-17, (32.1% identity in 246 aa overlap); P31453|YIDP_ECOLI from Escherichia coli (238 aa), FASTA scores: opt: 236, E(): 8.8e-09, (26.4% identity in 235 aa overlap); etc. (269 aa) | ||||
| rslA | Anti-sigma factor RslA; An anti-sigma factor for extracytoplasmic function (ECF) sigma factor SigL. ECF sigma factors are held in an inactive form by an anti-sigma factor until released by regulated intramembrane proteolysis (RIP). RIP occurs when an extracytoplasmic signal triggers a concerted proteolytic cascade to transmit information and elicit cellular responses. The membrane-spanning regulatory substrate protein is first cut extracytoplasmically (site-1 protease, S1P), then within the membrane itself (site-2 protease, S2P, Rip1), while cytoplasmic proteases finish degrading the r [...] (250 aa) | ||||
| higA | Possible antitoxin HigA; Antitoxin component of an atypical, type II toxin-antitoxin chaperone (TAC) system. Upon expression in M.smegmatis neutralizes the effect of cognate toxin HigB1. Neutralization of HigB1 toxin in E.coli or M.marinum also requires SecB-like chaperone Rv1957, making this the first toxin-antitoxin chaperone (TAC) system. Antitoxin aggregation and degradation are prevented by the chaperone. (149 aa) | ||||
| mce3R | Probable transcriptional repressor (probably TetR-family) Mce3R; Mce3R represses the transcription of mce3 operon and downregulates its own expression, but does not affect the transcription of mce1, mce2 and mce4 operons. (406 aa) | ||||
| Rv2011c | Rv2011c, (MTCY39.06), len: 143 aa. Conserved hypothetical protein, probable transcription repressor. Contains IPR011991 Winged helix-turn-helix transcription repressor DNA-binding domain. (143 aa) | ||||
| mraZ | Conserved protein; Rv2166c, (MTCY270.02), len: 143 aa. Conserved protein; shows strong similarity to several hypothetical bacterial proteins such as YLLB_BACSU P55343. Is equivalent to Mycobacterium leprae hypothetical protein ML0905 (143 aa, 92% identity) MLCB268.11c >sp|O69561|YL66_MYCLE hypothetical 16.1 KDA protein ML0905 >gi|3080482|emb|CAA18677.1|(AL022602) >gi|13092975|emb|CAC31286.1|(AL583920). FASTA scores: ML0905|ML0905 conserved hypothetical protein (143 aa) opt: 873, E(): 3.1e-52; 92.254% identity in 142 aa overlap; YLLB_BACSU P55343 hypothetical 16.6 kDa protein (143 aa) o [...] (143 aa) | ||||
| zur | Probable zinc uptake regulation protein Zur; Global transcriptional regulator involved in zinc homeostasis. Represses the transcription of at least 32 genes, including genes involved in zinc homeostasis, by binding to promoter sequences that contain a conserved 26 bp palindrome, in the presence of zinc; Belongs to the Fur family. (130 aa) | ||||
| hrcA | Probable heat shock protein transcriptional repressor HrcA; Negative regulator of class I heat shock genes (grpE-dnaK- dnaJ and groELS operons). Prevents heat-shock induction of these operons; Belongs to the HrcA family. (343 aa) | ||||